Have you ever wondered why a coroutine context is immutable and a mutex is non-reentrant? It turns out, both are corollary to the same basic rule: https://medium.com/@elizarov/phantom-of-the-coroutine-afc63b03a131

don't know about other's experience, but for me this article can't be fully rendered in Chrome on macOS. it causes Chrome prompts to kill the page or wait.